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Green Book Nonattainment Areas

8-Hour Ozone (1997) Nonattainment Areas (NAAQS Revoked)

As of April 6, 2015
View Notes
The 8-Hour Ozone (1997) NAAQS was revoked effective April 6, 2015 (80 FR 12264).
Current and historical design value data can be found at https://www.epa.gov/airtrends/values.html
Areas Listed Alphabetically Design Values at
1997 Ozone Designation

(2001-2003)
(ppm)
Classification No.
Counties
NAA
2010
Population
EPA
Region
State
1997 8-hr Ozone 1979 1-hr Ozone
Albany-Schenectady-Troy, NY 0.087 0.115 Marginal 7 970,156 2 NY
Amador and Calaveras Cos. (Central Mountain Cos.), CA 0.091 0.117 Moderate 2 83,669 9 CA
Baltimore, MD 0.103 0.143 Serious 6 2,662,691 3 MD
Boston-Lawrence-Worcester (E. Mass), MA 0.095 0.124 Moderate 10 5,723,468 1 MA
Buffalo-Niagara Falls, NY 0.099 0.116 Moderate 2 1,135,509 2 NY
Chico, CA 0.089 0.102 Marginal 1 220,000 9 CA
Dallas-Fort Worth, TX 0.100 0.135 Serious 9 6,221,286 6 TX
Denver-Boulder-Greeley-Ft. Collins-Loveland, CO 0.087 0.114 Marginal 9 3,330,139 8 CO
Essex Co (Whiteface Mtn), NY 0.091 0.113 Marginal 1 465 2 NY
Greater Connecticut, CT 0.095 0.139 Moderate 5 1,629,115 1 CT
Houston-Galveston-Brazoria, TX 0.102 0.175 Severe 15 8 5,891,999 6 TX
Imperial Co, CA 0.087 0.142 Moderate 1 174,528 9 CA
Jamestown, NY 0.094 0.115 Moderate 1 134,905 2 NY
Jefferson Co, NY 0.097 0.121 Moderate 1 116,229 2 NY
Kern Co (Eastern Kern), CA 0.098 0.118 Moderate 1 95,314 9 CA
Los Angeles-San Bernardino Cos. (W Mojave Desert), CA 0.106 0.138 Severe 15 2 868,350 9 CA
Los Angeles-South Coast Air Basin, CA 0.131 0.180 Extreme 4 15,717,914 9 CA
Mariposa and Tuolumne Cos (Southern Mtn), CA 0.091 0.113 Moderate 2 73,616 9 CA
Morongo Band of Mission Indians 0.000 Severe 17 1 913 9 CA
Nevada Co. (Western part), CA 0.098 0.116 Moderate 1 82,393 9 CA
New York-N. New Jersey-Long Island, NY-NJ-CT 0.102 0.146 Moderate 24 20,217,137 2-2-1 NY-NJ-CT
Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE 0.106 0.145 Moderate 18 7,796,590 3-2-3-3 PA-NJ-MD-DE
Pittsburgh-Beaver Valley, PA 0.094 0.120 Moderate 7 2,356,285 3 PA
Poughkeepsie, NY 0.094 0.126 Moderate 3 770,011 2 NY
Providence (all of RI), RI 0.095 0.130 Moderate 5 1,052,567 1 RI
Riverside Co. (Coachella Valley), CA 0.108 0.133 Severe 15 1 425,425 9 CA
Rochester, NY 0.088 0.110 Marginal 6 1,114,402 2 NY
Sacramento Metro, CA 0.107 0.143 Severe 15 6 2,243,911 9 CA
San Francisco Bay Area, CA 0.086 0.123 Marginal 9 6,970,997 9 CA
San Joaquin Valley, CA 0.115 0.151 Extreme 8 3,842,586 9 CA
Sheboygan, WI 0.100 0.124 Moderate 1 115,507 5 WI
Springfield (W. Mass), MA 0.094 0.132 Moderate 4 824,161 1 MA
Sutter Co (Sutter Buttes), CA 0.088 0.113 Marginal 1 33 9 CA
Ventura Co, CA 0.095 0.124 Serious 1 823,360 9 CA
Washington, DC-MD-VA 0.099 0.140 Moderate 15 5,136,216 3-3-3 DC-MD-VA
 
35 Total Areas 177 98,821,847  

No. of Counties reflects the number of counties in an area, while the total count only counts a county once and doesn't double count the county if it is in more than area.

Multi-state areas are counted in the nonattainment report until all state areas have been redesignated.

The design value for Boston-Lawrence-Worcester (E. MA), MA was used for the classification of Boston-Manchester-Portsmouth (SE), NH. The design value for Washington, DC-MD-VA was used for the classification of Fredericksburg, VA.

8-Hr Ozone classified area designations for the 1997 standard were effective on June 15, 2004.

Thirteen (13) 8-Hr EAC areas were designated attainment on April 15, 2008.

On June 8, 2007, the United States Court of Appeals vacated the Subpart 1 portion of the Phase 1 Rule - Court Order. On May 14, 2012, the Former Subpart 1 nonattainment areas were classified under Subpart 2 (77 FR 28424 ), effective June 13, 2012.


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